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- Slimes1800Codeforcesbinary searchconstructive algorithmsdata structuresgreedy
- Smilo and Minecraft1700Codeforcesbrute forceconstructive algorithmsgreedy
- Snowy Hills2194CodeChef
- Soldier and Number Game1700Codeforcesconstructive algorithmsdpmathnumber theory
- Solve The Maze1700Codeforcesconstructive algorithmsdfs and similardsugraphs
- Some More Homework2109CodeChef
- Sort Them2071CodeChef
- Sort the Array2076CodeChef
- Sort the Leaves2177CodeChef
- Sorting By Multiplication1800Codeforcesdpgreedy
- Sorting Segments2193CodeChef
- Space Voyage1700Codeforcesbinary search
- Spider's Web1700Codeforcesbinary searchsortingstwo pointers
- Split AND Sum2075CodeChef
- Spread Spree2188CodeChef
- Spy-string1700Codeforcesbitmasksbrute forceconstructive algorithmsdp
- Square String2002CodeChef
- Square-Free Division (easy version)1700Codeforcesdata structuresdpgreedymath
- Squares1800Codeforcesmath
- Squares Game2193CodeChef
- Squaring1800Codeforcesbrute forceconstructive algorithmsgreedyimplementation
- Stable market2151CodeChef
- Stack1800Codeforces*specialexpression parsingimplementation
- Stadium and Games1800Codeforcesbinary searchmath
- Stars Drawing (Easy Edition)1700Codeforcesbrute forcedpgreedy
- Statements Checking2151CodeChef
- Stone Game2060CodeChef
- Stoned Game1800Codeforcesbrute forceconstructive algorithmsgamesgreedy
- Strict Permutation2155CodeChef
- String Coloring (easy version)1800Codeforcesconstructive algorithmsdpgraphsgreedy
- String Deletion1700Codeforcesbinary searchdata structuresgreedytwo pointers
- String Game1700Codeforcesbinary searchgreedystrings
- String Game2080CodeChef
- String Problem1800Codeforcesshortest paths
- String Reconstruction1700Codeforcesdata structuresgreedysortingsstrings
- String Transformation 11700Codeforcesdsugraphsgreedysortings
- Subarray Removal2007CodeChef
- Submarine in the Rybinsk Sea (hard edition)1800Codeforcescombinatoricsmathnumber theory
- Subsegments1800Codeforcesdata structuresimplementation
- Subsequence Counting1700Codeforcesbitmasksconstructive algorithmsgreedyimplementation
- Subsequences of Subsequences2047CodeChef
- Substring1700Codeforcesdfs and similardpgraphs
- Substring and Subsequence1700Codeforcesdp
- Subtract Leading Digit2062CodeChef
- Subtraction Game 22105CodeChef
- Success Rate1700Codeforcesbinary searchmath
- Sum and product1700Codeforces*special
- Sum of Digits (and Again)1800Codeforcesbrute forceconstructive algorithmsmath
- Sum of Goodness2167CodeChef
- Sum of Nestings1800Codeforcesconstructive algorithms
- Sum of Subarrays Again2094CodeChef
- Sum of XOR Functions1700Codeforcesbitmaskscombinatoricsdivide and conquerdp
- Sum over all Substrings (Easy Version)1800Codeforcesbrute forcedpgreedystrings
- Sum this up2018CodeChef
- Summation over nCr2066CodeChef
- Super Numbers2066CodeChef
- Superhero Battle1700Codeforcesmath
- Surrounded1800Codeforcesgeometry
- Swap Dilemma1700Codeforcesconstructive algorithmsdata structuresdivide and conquergreedy
- Swap Sum2101CodeChef